Quantitative trait loci for agronomic and physiological traits for a bread wheat population grown in environments with a range of salinity levels

Genç, Yusuf; Oldach, Klaus; Gogel, Beverley J.; Wallwork, H.; McDonald, G.; Smith, Alison

doi:10.1007/s11032-013-9851-y

Cited by 42 publications

(58 citation statements)

References 61 publications

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“…high-affinity potassium (HKT) and (CLCs)] which in turn suggests common and separate genetic control. For instance, in the present study, Cl − QTL on 2A and 5A co-located with QTL for Na + and K + concentration, respectively [24]. A physiological explanation for these co-locations and correlations between cations (Na + and K + ) and anions (Cl − ) may be the charge balance between these two groups of ions since the net movement of ions must be balanced so that there is charge equivalence with small difference [13].…”

Section: Discussionmentioning

confidence: 44%

“…The results demonstrated that plant Cl − accumulation varied significantly between hydroponics and field trials and as a result, different QTL were identified between the two systems. As was the case with Na + concentration [24], [25], this was most probably due to the two systems being vastly different [24]. These results suggest that there may be very little value in hydroponics testing to predict field responses to Cl − concentration in bread wheat, and future studies should consider field testing or soil-based-pot assays as an alternative.…”

Section: Discussionmentioning

confidence: 94%

“…Field locations Roseworthy, Balaklava and Georgetown were classified as low, moderate and high salinity, respectively. Please see Genc et al [24] for soil salinity classification.*Positive and negative values indicate that Berkut and Krichauff alleles increased the phenotypic values, respectively. **The same co-locations appearing at multiple environments were presented only once.…”

Section: Resultsmentioning

confidence: 99%

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A Major Locus for Chloride Accumulation on Chromosome 5A in Bread Wheat

et al. 2014

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Chloride (Cl−) is an essential micronutrient for plant growth, but can be toxic at high concentrations resulting in reduced growth and yield. Although saline soils are generally dominated by both sodium (Na+) and Cl− ions, compared to Na+ toxicity, very little is known about physiological and genetic control mechanisms of tolerance to Cl− toxicity. In hydroponics and field studies, a bread wheat mapping population was tested to examine the relationships between physiological traits [Na+, potassium (K+) and Cl− concentration] involved in salinity tolerance (ST) and seedling growth or grain yield, and to elucidate the genetic control mechanism of plant Cl− accumulation using a quantitative trait loci (QTL) analysis approach. Plant Na+ or Cl− concentration were moderately correlated (genetically) with seedling biomass in hydroponics, but showed no correlations with grain yield in the field, indicating little value in selecting for ion concentration to improve ST. In accordance with phenotypic responses, QTL controlling Cl− accumulation differed entirely between hydroponics and field locations, and few were detected in two or more environments, demonstrating substantial QTL-by-environment interactions. The presence of several QTL for Cl− concentration indicated that uptake and accumulation was a polygenic trait. A major Cl− concentration QTL (5A; barc56/gwm186) was identified in three field environments, and accounted for 27–32% of the total genetic variance. Alignment between the 5A QTL interval and its corresponding physical genome regions in wheat and other grasses has enabled the search for candidate genes involved in Cl− transport, which is discussed.

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Section: Discussionmentioning

confidence: 44%

Section: Discussionmentioning

confidence: 94%

Section: Resultsmentioning

confidence: 99%

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A Major Locus for Chloride Accumulation on Chromosome 5A in Bread Wheat

et al. 2014

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“…This problem is further aggravated by injudicious irrigation practices which cause water tables to rise leading to salt accumulation in root *Corresponding author;E-mail: sewaram01@yahoo.com;Phone: 91 184 2209111;Fax: 91 184 2267390 zone. Crop productivity in salt-affected soil can be improved either by soil reclamation methods such as applying gypsum or growing salt tolerant cultivars (Genc et al 2013).…”

Section: Introductionmentioning

confidence: 99%

Expression of genes related to Na⁺exclusion and proline accumulation in tolerant and susceptible wheat genotypes under salt stress

Rana

Ram

Nehra

et al. 2016

Cereal Research Communications

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In the present investigation, expression of genes related to Na + exclusion such as salt overly sensitive (TaSOS1) and Na + /H + antiporter (TaNHX1) and proline accumulation such as pyrroline-5-carboxylate reductase (P5CR) and glutamate synthase (GOGAT) was studied in seedlings of Kharchia 65 (Kh 65, salt tolerant) and HD 2009 (sensitive) under salt stress (ECe, 12 dSm -1 ) and controlled conditions. As compared to HD 2009, Kh 65 showed significantly lower accumulation of Na + (p < 0.01) and higher accumulation of proline (p < 0.05) in leaf blade under salt stress. The relative expression of TaSOS1 increased significantly (p < 0.001) in roots of Kh 65 (4.31-fold) while it decreased in HD 2009. There was significantly higher (p < 0.01) relative expression of TaNHX1 (27.57-fold) in leaf and 3.07-fold in roots of Kh 65 as compared to 3.65-and 0.87-fold increase in leaf and roots of HD 2009, respectively, under salt stress. There was significantly (p < 0.05) higher accumulation of proline as compared to HD 2009 in leaf tissues. There was significantly higher (p < 0.01) expression of P5CR (5.23-fold in leaf and 8.77-fold in the root) and glutamate synthase (6.0-fold in roots) in Kh 65 as compared to HD 2009. The study demonstrated that upregulation of genes for Na + exclusion in root and compartmentation in leaf and increased proline concentration are associated with tolerance to salinity stress in wheat. The information will be useful for improving wheat genotypes for salt tolerance.

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“…QTL [30,71,182,189,[201][202][203][204][205][206][207], and durum wheat [41, 73, [211][212][213]. When QTL have been discovered, one approach is to then identify the gene in that region of DNA, which is responsible for the salt tolerance phenotype.…”

Section: Exploitation Of Natural Variationmentioning

confidence: 99%

Increasing Salinity Tolerance of Crops

Alqahtani¹,

Roy²,

Tester³

2019

Crop Science

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Plant growth and yield are severely affected by saline soils. High concentrations of salt in the soil make it difficult for plants to take up water, while the accumulated salts in cells, particularly the sodium (Na + ) and chloride (Cl À ) ions, are toxic to plant metabolism. These two factors result in a reduction in plant growth, an increase in the rate of leaf senescence, and a loss of crop yield. The fact that significant areas of farmland worldwide are affected by salt brings with it potentially serious implications for crop yield.

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Quantitative trait loci for agronomic and physiological traits for a bread wheat population grown in environments with a range of salinity levels

Cited by 42 publications

References 61 publications

A Major Locus for Chloride Accumulation on Chromosome 5A in Bread Wheat

A Major Locus for Chloride Accumulation on Chromosome 5A in Bread Wheat

Expression of genes related to Na⁺exclusion and proline accumulation in tolerant and susceptible wheat genotypes under salt stress

Increasing Salinity Tolerance of Crops

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Quantitative trait loci for agronomic and physiological traits for a bread wheat population grown in environments with a range of salinity levels

Cited by 42 publications

References 61 publications

A Major Locus for Chloride Accumulation on Chromosome 5A in Bread Wheat

A Major Locus for Chloride Accumulation on Chromosome 5A in Bread Wheat

Expression of genes related to Na+exclusion and proline accumulation in tolerant and susceptible wheat genotypes under salt stress

Increasing Salinity Tolerance of Crops

Contact Info

Product

Resources

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Expression of genes related to Na⁺exclusion and proline accumulation in tolerant and susceptible wheat genotypes under salt stress